To add to the discussion on Bunnyhug, it is primarily a Saskatchewan thing, I do hear it from time to time elsewhere though.
Re-reading the first post I realized most of my favourite slang really doesn't fit. The only really bro-y slang I know has mostly already been mentioned.
Dawg: Synonym for bro
Hipster: it's pretty obscure one you probably wouldn't have heard of it.
Easy: Slag for someone being, well easy to get in the sack.
Stud: As in a fine male specimen
That's all I've got that I can think of that I didn't see mentioned already, based on the category you were looking for.